How to run multiple consoles from one class?

Question

I have three classes which all make different works but I need to run them together. When I run all of them in one class I just get one console and cant change this console. What I want is to run them in one class and see each console . How can I do that ?

To be more clear ,

when I run first class, I get --> console 1
when I run secondclass, I get --> console 2
when I run third class, I get --> console 3

but instead of doing it seperatly, when I do it;

Run 1,2,3 ----> I get console 1

The thing I want is

Run 1,2,3 ----> I get console 1, 2 and 3

Thank you all

EDIT 1 : Sorry for not-enough info I use Eclipse to run my code, and I am talking about Eclipse console.

How are you opening up a console? Or are you using the one given to you? — Peter Lawrey, Sep 21 '11 at 14:14
A little more info please. How are you running them ? Console command, through an IDE, something else ? — Simeon, Sep 21 '11 at 14:14
@MikeG yes I am using Eclipse and also sometimes I use SpringSource Tool — Ozer, Sep 21 '11 at 14:14
@ Peter Lawrey I just run the code I have written so I can get the Eclipse Console — Ozer, Sep 21 '11 at 14:15
@Simeon Sorry for not-enough info, I use Eclipse and I run my code — Ozer, Sep 21 '11 at 14:16
Not possible AFAIK. Your output will be going to the same console if it's being invoked from the same `main` method. Why do you want to do this anyway? — Perception, Sep 21 '11 at 14:30

score 1 · Accepted Answer · edited Mar 04 '15 at 14:32

A certain way to do it would be to open 3 separate terminals and do java Class<n> (without .class extension) in each terminal.
I don't think you can do it in Eclipse with a single workspace (it could be possible though ...), one way to do it is to create separate projects for each class and open each project in a separate workspace simultaneously, but this is too much work IMO. 1. is probably the easiest/fastest way to do it.

score 0 · Answer 2 · edited Feb 20 '17 at 23:13

INMO, if your underlying OS is Windows then you need to handle console and use JNA or JNI that allows you to call win32APIs from java, but if your underlying OS is Unix-like then you need to find a way to communicate with syscall APIs in java. by calling native APIs you can call native console and if you know how to create a native console then you can create multiple instances of native console.

score 0 · Answer 3 · answered Sep 21 '11 at 14:16

0

You have to invoke java command separately for each class in different console. With one java invocation, i think, there will be only one console associated.

answered Sep 21 '11 at 14:16

kdabir

9,623
3
43
45

score 0 · Answer 4 · answered Sep 21 '11 at 14:16

Obscure question. But it seems that you need separate console outputs for your classes. I don't think it is possible. That is operating system restriction. If operating system supported that you could somehow create additional consoles.

As a solution you can give your classes PrintStream object which they will use to output data.

score 0 · Answer 5 · answered Sep 21 '11 at 14:30

You could run a server-like application which would accept messages and then display them in the console. The class would start each of your other main methods in new Threads, and then wait indefinitely for messages, ending when the other three threads close.

How to run multiple consoles from one class?

5 Answers5

Linked